External Memory Interface Handbook Volume 3: Reference Material

ID 683841
Date 7/24/2019
Public
Document Table of Contents

1.15.2. Ping Pong PHY Architecture

The following figure shows a top-level block diagram of the Ping Pong PHY. Functionally, the IP looks like two independent memory interfaces. The two controller blocks are referred to as right-hand side (RHS) and left-hand side (LHS), respectively. A gasket block located between the controllers and the PHY merges the AFI signals. The PHY is double data width and supports both memory devices. The sequencer is the same as with regular UniPHY, and calibrates the entire double-width PHY.
Figure 21. Ping Pong PHY Architecture


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